Change: OriginFlexor retinaculum, scaphoid, and trapezium
Insertion Lateral side of base of proximal phalanx of thumb
NerveMedian
ActionAbducts thumbFlexor pollicis brevisFlexor retinaculum and trapeziumBase of proximal phalanx of thumbMedianFlexes thumbOpponens pollicisFlexor retinaculum and trapeziumLateral side of first metacarpalMedianOpposes
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(Word count: 289)